Oil burner



Aug. 30, 1927; 3

I L. L. SCOTT OIL BURNER Filed April 5. 1926 VETOR W 1,4

- Patented Aug. 30, 1927.

"UNITED, STATES PATENT OFFICE- LEWIS nsoo'rr, on ST. Louis, MISSOURI.

. OIL 'IBURNE R.

Application filed April 3, 1926. Serial No. 99,539.

grate bars and to project the burner intov the ash door of the furnace. The lower part of the furnace that was formerly the ash 7 space, is converted into a combustion cham' 1'6 her for the oil fire by laying a floor and side walls of fire brick.

In many instances, the insidediamete'r ofthe furnace is as small as and the distance from the burner nozzle to the fire brick 15 floor is only 3 or 4". This gives us a combustion chamber which isirather close to the fuelnozzle, with the exception ofthe;

space above, which space above is large.

Under these conditions,it is very diflicult to.

prevent the formation of carbon on the floor and walls of the combustion chamber. L

I have found that by setting the fuel nozzle eccentric in the air mixing chamber so that there is more air under and on the sides'of the fuel spray than on the top side of said spray, I can change the form of the flame, as compared to ,the, round flame burner, and thereby prevent the formation of carbon on the floor and side walls of the combustion chamber.

I am aware of the fact that the flat flame type of burner,.such.as shown in Patent No. 1,086,714, issued toD. J. Irish, dated February 10th, 1914, is notv new. The type of 3 5 burner shown in the; Irish patent, however, is not adapted to the conditions I have before mentioned, because, (as I have before I stated), of the space limitation on the sides as well as onthe bottom. In the Irish patcut, the space conditions at the top and bottom are very limited, and there is a great deal of space on either side. My type of burner might be well called an eccentric flame burner, so as to distinguish it from the round 'flame burner and the flat flame burner,

In the accompanying drawings, Figure l i f is a top view of my burner assembly, shown installed in a furnace, and also showing a diagram of the electric wiring. Figure 2 is an enlarged sectional view of my burner head.

Figure 3 is a front end view of Figure 2. Figure 4 is'a back end view of Figure 2, shown in reduced size, and with the oil diaphragm removed.

. 20 .to 100 pounds pressure, so that fuel will as porcelain. The disc 18 is provided with Referring now to the drawing, the

numeral 1 indicates an electric motor which operates a blower wheel 2 and an oil pump 3. The numeral 4 is a suction pipe running from pump 3 to an oil tank, not shown. 5 is the discharge from pump 3, which runs to casting 6,. which casting connects to fuel spray nozzle 7. The pump 3 is adapted to force liquid fuel through nozzle 7, at from be sprayed into a. very fine fog-like mist.-

8 is an air receiver which is connected to the blower casting 9 by the air pipe 10. By[ referring to Figure 4, it will be seen that the air receiver 8 is in the form of an involute curve and is adapted to rotate the air which rotating air will pass into the outer flame directorgll. The numeral 12 is a conical tip placed on the end of the outer air director. 13 indicates a section of a furnace into which the oil flame is projected. 14 indicates an inner air director which is supported by the nozzle extension 15, through the screws 16, which screws are threaded into thepart 17 in a manner that permits said screws totighten against the nozzle extension15. The numeral 18 indicates a circular disc, made of insulating material such six small air holes 19. The disc 18 is secured to the part 17 by the screws 20 and is adapted to carry the spark wires 21, which wires are secured to disc 18 by the nuts, as clearly shown in Figure 2. The wires 22 and 23 connect to the spark wires and run to theinsulating block 2 1, whichblo'ck is, carried by the air receiver head 25. The air receiver head 25 also carries the nozzle extension tube 15, which tube is held secure by the set screw 26:

I will now describe the electrical connections and control devices.

The numeral-s 28 and 29 indicate the main power wires. 29 runs directly to motor 1 and spark transformer 30. The wire 28 runs to motor 1 and spark transformer 30 through the relay switch 31. The high tension wires 32 and 33, of the transformer 30, run to the spark wires 34 and 35. The numeral 36 indicates a small transformer, which is connected to power wires 28 and 29, and which reduces the 110 .volt. circuit to about 15 volts. The numeral 37 indicates a room thermostat, which isusually placed in the living room of the house and controls 11c the operation of the burner according to room temperature. The wire 38 runs from the transformer 36, through room thermostat 37, wire39and relay switch 40, and back'to transformer 36, thereby completing the 15 volt circuit.

When the room temperature drops so as to close the contacts on room thermostat 37, the relay switch 40 will be energized, theremotor 1 and spark transformer 30.

by'closing the switch 31 and starting the Fuel will be sprayed out of the nozzle 7 and air will be forced from the blower through the pipe 10 into the air receiver 8 and will'be caused to take a rotating motion by said air receiver, and will flow to the fuel spray through air directors 11 and 14. The'electric spark, at the terminals of the spark plug, will ignite the fuel and the oil flame will burn in the combustion chamber 41. It will be noted that the fuel tube 15 and fuel nozzle 7, and all parts carried thereby, are set eccentric from the air director extension 11-this is plainly shown in Figures 2 and 3.

Byreferring to Figure 3, itwill be evident that the quantity of a1r around the fuel spray will be greatest on the bottom and for igniting the fuel, means for furnishing air to the fuel spray to promote combustion, 1 a mlxing cone for causing the air to be mixed with the fuel spray, a disc located back of the fuel nozzle in the path of the air going to the fuel spray, an air receiver "which receives air from an air supply means and Wl'llCll causes sald a1r to rapldly rotate,

said air receiver having a projecting casting 1n whlch 1s enclosed said fuel nozzle, 1gn1-.

tion means, mixing cone and disc, said fuel nozzle, ignition means, mixing cone and disc belng located GCCGIltIlO from theair rece1ver castingn 2. In an oil burning device of the class described, in combination with a spray nozzle and means for supplying fuel thereto,

means for igniting the fuel, means for fur nishing air to the fuel spray to promote combustion, a mixing cone for causing the air to be mixed with the fuel spray, a disc located back of the fuel nozzle in the path P of the air goingto the fuel spray, an air receiver which receives air from an air supply means and which causes said air to rapidly rotate, said air receiver having a projecting casting, said casting having its outlet formed with a reduced cone-like diameter, in which is enclosed sald fuel nozzle, ignition means,

mixing cone and disc, said fuel nozzle, ignl tion means, mixing cone and disc. being 16- cated eccentric fr 111 the air receiver casting.-

iereof, I have hereunto set I1}11'tes5tl;imony w my an t LEWIS L. SCOTT. 

